Costeño Beach Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s talk about what’s on offer at Costeño Beach. This is an exposed beach break, so it’s picking up that consistent NE swell energy, and honestly, it’s a bit of a mixed bag over the next couple of weeks. The water is sitting at 29°, which feels about average for this time of year.

We’ve got some swell right from the start. Tuesday morning the 25th sees a NE swell around 1.6m with an 8-second period and moderate energy (341). The wind is light and cross-onshore, so it’s okay but nothing to write home about. The afternoon bumps up to a solid 2.0m, energy jumps to 519, and it’s still cross-on. The potential is there, but these “marginal” comments are real—tide conditions look a bit iffy.

Wednesday the 26th keeps that 2.0m NE swell, with a light cross-offshore in the morning. That’s the best looking session early on—cleaner lines possible there. But by the afternoon, the wind switches onshore with risk of storms, so it gets messy.

Thursday the 27th stays in that 2–2.2m range but the period drops to 7 seconds, energy’s still solid around 472, but it’s choppy with onshore winds. Not great. Friday the 28th actually drops off—1.4m, weak period, poor surf conditions.

Now, there’s a gap in quality from Friday the 28th all the way through to Tuesday morning the 1st of September. We’re looking at weak, short-period swell, mostly poor to marginal ratings, and no real standouts. That’s about four days of disappointing surf.

But then things shift. Tuesday afternoon the 1st of September, we get a surprise: the swell drops to 1.1m, but the wind goes glassy. That’s clean, surfable little waves—nothing for the pros, but fun for a beginner on a log. Wednesday the 2nd is even smaller at 0.9m, but also glassy. That’s some of the cleanest conditions in the whole outlook, but the size is tiny, with weak energy (77–78). It’s more of a cruise than a session.

Then Thursday the 3rd through Saturday the 5th sees the swell picking up again, back to 2–2.2m NE, with moderate to strong energy (up to 681 by Friday afternoon). Problem is, it’s cross-onshore almost the whole time. The surf is there, but it’s average at best.

Here’s where I get a little excited. Sunday the 6th of September is the standout of the whole outlook. The morning starts with a 1.6m NE swell, but the wind? Glassy. Clean. Nice. And then Sunday afternoon—hold onto your board. We get a 2.3m NE swell, period stretching to 9 seconds, and the wave energy surges to 798. And the wind—glassy again. That’s a rare combo for this break. This will be a proper session. Not for beginners though—2.3m on a beach break with short period can be a handful. That’s for the experienced crew.

Monday the 7th keeps the energy up (625–819) with 2–2.4m NE swell, but it’s back to cross-on winds. Still, there’s plenty of juice in the water.

As we push into the second week, things are less certain. Tuesday the 8th and Wednesday the 9th drop back a bit. Tuesday sees 1.8m with onshore wind in the afternoon. Wednesday the 9th morning gets a bit choppy with 15 km/h cross-onshore, but Wednesday afternoon, 1.6m NE swell turns glassy again. That’s another clean window late in the forecast.

So to wrap it up: the best on offer is Sunday the 6th of September, hands down. Sunday morning is clean and manageable, Sunday afternoon is the big one—glassy, strong NE swell, real energy. That’s your session. Wednesday the 2nd is worth a mention for beginners wanting clean tiny waves. Everything else is average to marginal.

Keep an eye on that Sunday. It’s a ways out, but it’s the one that could be special.

Rusty out.

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